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High-res. surveys |
Turbulence |
Moorings & NDBC |
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Coastal radar |
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Data assimilation |
J. Barth
email alias: "coast@oce.orst.edu" will reach all participants
Web page: see http://damp.coas.oregonstate.edu/coast for evolving COAST web
page maintained by Steve Pierce. Please provide Steve with
links to your own components so that we can continue to make
this site more useful.
Microstructure profiler and pumped profiler test cruise report:
Jim Moum reported that the 21-28 March 2001 test cruise on Thompson
in Puget Sound went well. He showed a vertical section of hydrographic,
velocity and microstructure data documenting a hydraulic jump over a
sill in Puget Sound. Jim reported that the Thompson's dynamic positioning
system in combination with the two Z-drives and the bow thruster made it
potentially dangerous to use the loosely-tethered turbulence profiler off
the stern. Jim can do the work, but is concerned about encounters between
the profiler and the Z-drives. He has built extra profilers to be ready.
Burke's pumped profiler cycled vertically okay and supplied 7.5 liters/min
to the lab. He is working on modifications that will keep the package
from kiting and moving aft where it might interfere with the turbulence
profiling. Jim and Burke will test their equipment again on Thompson
during the first day of the May-June cruise (17 May). It is likely they'll
have to cruise around 1 knot in order to use both systems. It is still
unclear whether they can be profiling simultaneously or will need to
alternate. Jim concluded by suggesting that he'd like to use the Thompson's
Seabeam system to map the bathymetry on the Newport line in support of
analysis of NOPP '99 turbulence data. (Post mtg note: It would be useful
to do similar mapping in the regions of the northern and southern profiling
lines as time permits.)
May-June Logistics:
We discussed the May-June cruise and aircraft coordination issues.
The draft calendar and a sampling map are on the COAST web page.
Airplane: Will arrive in Corvallis on 10 May and have a first flight on
15 May +- a day for weather. Flight pattern will be over the Big Box
pattern. AXBTs will be launched to provide a first look at the subsurface
T structure. The mooring group responded that launching AXBTs outside
of a 1/2 nautical mile watch circle around each mooring would be okay.
Jack and Murray agreed with John Bane's suggestion that the aircraft should
sample south of the northern mooring line (45 0'N). This would be 44 59'N.
Note that the SeaSoar and profiling vessel sampling lines are 1 nm north
of 45N at 45 1'N. Office space for the airplane group is being arranged
in Burt I, 4th floor.
Meeting to review latest data prior to Thompson sailing:
We agreed that it would be useful to hold a *brief* mtg on 16 May after
the airplane data are available and while the Thompson is at the dock being
loaded. We could review the airplane data, available radar, satellite SST,
satellite color, weather forecasts, etc. It might be best to hold this
meeting in Newport since the Thompson scientists will be busy loading.
Mooring cruise plans:
Murray Levine reported on cruise plans for the 15-20 May mooring deployment
cruise. They will set the northern mid- and inner shelf moorings first,
then CTD along the 45N line (for CTD locations see COAST web page).
They will try and send the CTD data/plots to shore for use by COAST
scientists. They will then transit to 44 12'N) and deploy the three
southern moorings. This will be followed by doing CTDs on the southern
line, then returning to the northern line to finish the mooring deployments
at the shelfbreak. In the event of good weather and successful mooring
operation, there is some time available on 18 May for other measurements.
These will include testing of a long-range Doppler and a CTD time series.
The mooring group was open to other suggestions as to how to spend this
time. ETA Newport is tentatively planned for 1005-1200 on Saturday 19 May.
After offloading, this will allow the SeaSoar group to begin loading
a 1/2 day early.
Burke Hales would like to have Dale Hubbard set up the underway nutrient
analyzer on Wecoma before the mooring cruise and have Dale go on the cruise
so that the system could be tested before its use on the Wecoma SeaSoar
cruise. He will use bench space in the wet lab just aft of the fwd sink.
Burke will also set up the pCO2 system before the mooring cruise. It will
go fwd of the fwd sink in the wet lab.
Communications:
We will use the MarTech's shoreside computer to exchange data and graphics.
Toby Martin (toby@oce.orst.edu) is the OSU MarTech contact. He'll need
to get the name of the machines from which people expect to ftp from/to the
MarTech machine so that he can authorize the connection. Types of
data to be put there are: SST (Jack to run cron job to place byte arrays
of data; Ted Strub will provide advice about the quality of individual
images to the ChScis via email so that they can decide which images to
transfer to sea); MODIS/SeaWiFS (Letelier/Abbott to coordinate);
radar (Kosro); aircraft (Bane et al.); SeaSoar data (Barth et al.);
CTD data from mooring cruise (Levine et al.); Thompson data (Wheeler et al.).
Wecoma's transfer system is automated and is done via cell phone. Toby
Martin will check with Thompson's MarTechs about their xfer system.
Hopefully a cell phone can be employed rather than expensive INMARSAT.
Moored nitrate sensor?:
Coincidentally, a representative of WS EnviroTech Inc. (formerly WS Oceans),
Carl Moellenberndt, met with a few of us (Barth, Hales, Kosro) to update the
status of their moored nutrient sensor. Burke drilled him on the chemistry,
but the rep was not versed enough in chemistry to provide all the answers.
The WEST CoOP project has 4-5 of these and will deploy them this summer.
Their early tests last year look promising. Jack will contact Largier/Dever
to ask for documentation of their test results. Whitledge at UAF has a 10 or
so and Mordy at PMEL has 7. Basic unit is $19K with 8 week delivery time.
They also have a new package that can sample multiple nutrients including
choices of nitrate, nitrite, silicate, phosphate and ammonium. This unit
goes for around $25K.